A view of the magnetic field as if the accessory were sliced vertically down the middle and viewed from the side. The cross-section diagram in our reports shows how field strength varies both horizontally across the surface and vertically as the field rises away from the accessory. Color indicates field strength and field lines show direction and relative intensity.
The field is strongest right at the coil and weakens with distance in every direction. On the on-axis dipole model the report uses, it reaches half its peak strength at about three quarters of a coil radius from center and one tenth at about two radii. A larger coil holds the field up farther out.
